Michael Collins passed away on April 28th, 2021. While Neil Armstrong and Buzz Aldrin were on the moon, Collins was in the Command Module, orbiting the moon by himself for 28 hours.
He is often referred to as the "forgotten" astronaut. While half a billion people on Earth watched as Armstrong took his first steps and uttered his famous words, Collins was on the far side of the moon, cut off from all communication.
"I had this beautiful little domain. It was all mine. I was the emperor, the captain of it, and it was quite commodious. I had warm coffee, even." 